Five different methods of determining relative amounts of heavy minerals were evaluated using two splits of the same sand sample (F and F*) collected by Rittenhouse (1943) from the Rio Grande at Bosque, N. Mex. Relative deviations in percent computed for each set of results were used as the basis for comparison. Methods compared included: number percentage, weighted number percentage, weight percentage, hydraulic ratio, and mineral ratios. The total weighted number percentage method yielded the lowest percentage relative deviation.

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